To make it unnecessary to align holes and thus reduce efforts to replace an abrasive material when an abrasive material having dust-collecting holes is installed in a dust-collecting abrasive backup pad. A dust-collecting abrasive backup pad comprising: a substrate sheet material having a sander fitting surface, a major surface and at least one dust-collecting holes; a bridge-like support material having at least one bridge piers fixed on the major surface; a mesh material (4) fixed on the bridge-like support material so as to be parallel to the major surface; and a dust pocket formed between the substrate sheet material and the mesh material (4) for communicating plural mesh holes of the mesh material with at least one dust-collecting holes of the substrate sheet material .
